Machu picchu exposed - national geographic

In the depths of the Andean mountains there is a mysterious ruin named Machu Picchu, which for 400 years was abandoned on a cliff fog submerged in the jungle. Rediscovered in 1911, it contains no written records or prints, anything that might shed light on the history of this place. Since then, for nearly a century, it has defied endless records of visitors and scientists trying to understand its purpose. But now an international team of archaeologists, engineers and scientists are gathering clues to find out. Together, they are discovering new treasures that reveal the secrets of its engineers and thus ultimately decipher the mysteries of Machu Picchu.